DE102020118377A1 - Computerized residue detection and/or forecasting system and method and agricultural spreader - Google Patents

Abstract

The invention relates to a computer-aided system for determining and/or forecasting residues, in particular chemical and/or biological residues, on agricultural crops, with a computer unit (100) and an evaluation program stored in it, and an output device (110). In order to create a possibility of being able to determine and/or forecast residues on agricultural crops more precisely, it is provided that the evaluation program is set up to relate at least two factors that influence residues. The invention also relates to a method for determining and/or forecasting of residues and an agricultural spreader (120).

Description

The invention relates to a computer-aided system for determining and/or forecasting residues, in particular chemical and/or biological residues, on agricultural crops. The invention also relates to a method for determining and/or forecasting residues. In addition, the invention relates to an agricultural spreading machine.

When cultivating agricultural crops and useful plants, for the production of agricultural crops, various plant protection measures are generally carried out, in each of which plant protection agents are applied and distributed by means of agricultural distributors. Chemical or biological active ingredients are used as plant protection agents in order to combat undesirable harmful organisms, for example leaf- or fruit-damaging insects, undesirable field herbs or storage pests. To achieve the desired effects, users have a large number of active ingredients at their disposal, which can be distributed in a wide variety of concentrations and quantities using agricultural distribution machines.

Depending on various factors, however, it can happen that residues of the active ingredients are still contained in the agricultural crop or in the foodstuffs made from the crop. In some cases, these residues can sometimes be harmful to health and the environment.

In order to reduce residues, there are, among other things, country-specific legal requirements that specify so-called good professional practice and restrictions for plant protection measures and plant protection products. However, these restrictions only reflect assumptions about possible residues and do not correspond to any realistic determination or forecast of residues, in particular no realistic determination or forecast on the basis of factors influencing residues.

The object of the invention is therefore to create a possibility of being able to determine and/or forecast residues on agricultural crops more precisely.

This object is achieved by a computer-aided system for determining and/or forecasting residues with the features of independent claim 1, by a method for determining and/or forecasting residues with the features of method claim 14, and by an agricultural distribution machine with the Features of claim 20. Advantageous embodiments and developments of the invention are disclosed in the claims and the following description with partial reference to the figures.

The invention relates to a computer-aided system for determining and/or forecasting residues, in particular chemical and/or biological residues, on agricultural crops.

According to the invention, the computer-aided system includes a computer unit with an evaluation program and an output device.

In order to create a possibility of being able to determine and/or predict residues on agricultural crops more precisely, it is provided that the evaluation program is set up to relate at least two factors that influence residues.

The invention makes use of the knowledge that residues on agricultural harvested crops are defined by at least two factors, which in particular influence one another, and that these at least two factors can be related in this way, ie, for example, can be related in this way determine and/or forecast a quantity of backlogs. By means of the computer-supported system, a possibility is therefore created of determining and/or forecasting residues on agricultural crops using factors and no longer, as was previously the case, through assumptions or only on the basis of legal restrictions.

According to the invention, there is a relation, preferably a comparison, a relation, a linking and/or the like of at least two factors influencing the backlog.

The setting in relation takes place in particular with an evaluation program stored in a computer unit (e.g. computer unit).

According to the invention, residues on agricultural crops are determined and/or forecast, with a determination corresponding in particular to a calculation of an actual amount of residues and with a forecast corresponding in particular to an expected, foreseen and/or predicted amount of residues. It is also possible for a forecast to include an assessment, estimation and/or the like.

According to the invention, it is possible for determination to take place offline or online and for forecasting to take place offline, with offline automatically corresponding to a process, for example in the office on a server, especially not live during operation of an agricultural distribution machine, and online corresponding to a process live during operation of an agricultural spreader.

A preferred embodiment provides that the system is designed to determine and/or predict chemical and biological residues or to determine and/or predict chemical or biological residues. The residues can be in particular foreign substances, pollutants, contamination of the agricultural crop. In addition, it should be pointed out that contaminants are also included in the definition of residues.

According to one aspect, it is possible for the evaluation program to be set up to use the relation (e.g. the result of the relation) to determine and/or forecast a quantity of residues, in particular chemical and/or biological residues, on agricultural crops.

According to the invention, provision can preferably be made for the evaluation program to be set up to analyze residues for one substance (e.g. chemical substance, biological substance) and/or for several different substances (e.g. chemical substances, biological substances) and/or for one or more substances (e.g. chemical substances , biological substances) comprehensive sum of residues to determine and / or to predict. It can also be provided that, for example, a selection can be made as to whether a determination and/or forecast is to be carried out for one substance and/or for several different substances and/or for a sum of residues comprising several substances. Provision can also be made for determining and/or forecasting a freely defined and/or definable (e.g. by the operator, consumer, etc.) substance or for an active ingredient concentration of a substance to take place.

The agricultural crop can be grain, for example. However, the agricultural crop can also be agricultural biomass (e.g. maize (e.g. silo maize), grass, straw, oil crops, sugar beet, or the like) or the like. The harvested crop can be harvested, or is harvested, preferably by means of agricultural harvesting machines.

In order to improve the output of the residues determined and/or predicted by relation, it can be provided according to a development of the invention that the evaluation program is set up to process threshold values for residues, in particular for chemical and/or biological residues, with the threshold values being able to be entered manually (e.g. by an operator) and/or can be read (e.g. by means of data transmission).

The threshold values can be defined, for example, by a percentage (e.g. residue concentration), e.g. in the weight of the residues compared to the total weight of the crop. The threshold values can also be defined by a maximum weight, e.g. in a ppm range (mg of active substance per kg of food), or in a ppb range (mg of active substance per t of food).

According to an alternative or supplementary aspect, the computer-assisted system is set up in such a way that, depending on residues, it enables a harvest forecast for the agricultural crop to be made. In particular, the system makes it possible to use determined and/or predicted residues to plan harvest quantities which, for example, do not exceed a threshold value and which quantities do. In particular, it is therefore also conceivable to plan or influence plant protection measures accordingly.

According to an alternative or additional embodiment, the evaluation program can be set up to process threshold values for residues, in particular for chemical and/or biological residues, and to carry out a yield and/or harvest forecast based on threshold values. In particular, it can be provided that the evaluation program is used to make a forecast with regard to a harvest quantity which harvest quantity does not exceed a threshold value.

According to the invention, this can take place in particular before the harvest, i.e. during the growing season of the agricultural crop, and can also be done, for example, with a recipient (e.g. crop storage system). It should be pointed out that in the present context, the term harvested crop storage system encompasses all types of storage options or removal options for agricultural crops. That means, for example, warehouses, crop processing companies, and/or the like.

According to an alternative embodiment, it can also be provided that the evaluation program is set up for threshold values To process residues, in particular for chemical and/or biological residues, and to initiate a definition and/or influencing of a harvested quantity of agricultural crops on the basis of threshold values. It can thus be provided that, in order to achieve at least a desired harvest quantity which does not exceed a threshold value for residues, a plant protection measure is adapted in accordance with the quantity of residues determined and/or predicted by means of a relation. This enables the farmer to take appropriate measures at an early stage in order to obtain the greatest possible benefit from the harvested crop when it is sold, for example it is possible to plan whether the harvested crop should be as residue-free as possible or as high a yield as possible, i.e. as high as possible Harvest quantity is to be achieved.

In order in particular to achieve an improved harvest prognosis and/or to achieve an improved influencing of a plant protection measure, for example, it can be provided that a threshold value for residues is defined as a function of various criteria. An evaluation is carried out as criteria, for example, as to whether the crop is used as food for a person (e.g. also taking age into account) and/or as food for an animal and/or whether the crop is used as food or seed and/or or whether the crop is processed directly or not.

For example, the threshold values can be defined differently when the crop is used as food (ie food) than when the crop is used as seed, for example. The present invention thus enables the farmer to plan this accordingly, ie the farmer already knows during the vegetation phase that the largest possible amount of, for example, food for animals means maximum profit, he can adapt his plant protection measures accordingly to achieve the largest possible harvest quantity and does not have to pay as much attention to residues, for example, as if, for example, the harvested material is used as food for people, especially for children.

The residues can be caused, for example, by plant protection measures (e.g. plant protection products, fertilizers, seed dressings). However, the residues can also be caused by air pollution (e.g. fine dust pollution, atmospheric pollution, acid rain).

The at least two factors to be related by means of the evaluation program can be determined in a wide variety of ways. Provision can be made for at least one factor influencing the residue to be measurable (e.g. sensory). It would also be conceivable that at least one factor influencing the residue can be determined empirically and/or that at least one factor influencing the residue can be determined by means of mathematical calculations, which are carried out, for example, by the evaluation program. Alternatively or additionally, it would be conceivable that at least one factor influencing the residue can be entered into the evaluation program (e.g. manually by an operator) and/or can be read into the evaluation program by means of data transmission (e.g. from a database, data cloud, sensor device, etc.).

According to the invention, it can be provided that a wide variety of factors can be entered into the evaluation program and the factors can be related by means of the evaluation program. A relation can be carried out in each case as soon as at least two factors are present, it also being the case here that the more factors are present, the more precisely the determination and/or forecast of the residues.

According to a further aspect of the invention, it can be provided that at least one factor influencing residue is defined by at least one time, in particular effective time and/or an instability and/or an environmental resistance.

The time, in particular the effective time, can be defined, for example, by a time between the plant protection measure and the harvest, or by a time between the plant protection measure and the processing (e.g. into a food), or by a decomposition time of the chemical and/or biological substance. It can be said that the longer the time, the lower the amount of residue.

The instability can be defined, for example, by factors relating to the crop protection measure, e.g. by a drift size and/or a distribution quality, by a degree of wetting, by a type of active ingredient, by an active ingredient concentration, by an amount of active ingredient per area size, by an intended use of the plant protection product. It can be said that the greater the instability - the lower the amount of residue.

The environmental resistance is defined in particular by natural, ie biological protective mechanisms and defenses, for example moisture, rain wash-off, biodegradation, stand density, growth stage and/or the like. Whereby the greater the environmental resistance - the lower the level of residue.

It is also conceivable that at least one factor influencing the residue is defined by work processes that are carried out when processing the agricultural crop. I.e. if, for example, a cleaning process is carried out during further processing, the crop is heated and/or the like.

It is also conceivable that the evaluation program is set up to use a number of factors to output a guide value of how exact the result is, or the probability of the result being exact.

The computer unit can be part of a control and/or regulation device and/or be signal-connected and/or signal-connectable (e.g. wirelessly and/or wired) to a control and/or regulation device of an agricultural distribution machine and be set up based on residues adapt to be distributed plant protection products. In this way, it can be achieved in particular that a plant protection measure is carried out in a targeted manner in such a way that the residues are within a desired range.

In an advantageous embodiment, the amount of crop protection agents to be distributed is adjusted in such a way that a threshold value of residues, in particular for chemical and/or biological residues, on agricultural crops is not exceeded.

An advantageous embodiment of the computer unit provides that it is set up to receive, generate and/or call up residues influencing factors (e.g. by sensors, through input from an operator, by reading in or retrieving from a data cloud), the residues influencing factors in To set the relation (ie to process it) and to output a result that defines a residue, preferably by means of an output device (eg graphically, acoustically, haptically).

The computer unit can be formed by an operator terminal, a mobile terminal device, a computer (e.g. a yard PC), an on-board computer and/or the like and can have an output device and/or be signal-connected and/or signal-connectable to an output device. The output device can be a terminal, a screen, a mobile end device and/or the like and can also be set up to carry out a graphic, visual and/or haptic output.

The evaluation program can be stored in the computer unit, in particular in a memory of the computer unit.

In the context of the invention, the evaluation program can also be called up from a database, for example, and in particular can be called up from the database by means of the computer unit.

In the context of the invention, computer-aided includes in particular a computer-aided or computer-aided system.

It should be noted that the plant protection measure can include, for example, the distribution of sprays (e.g. solid or liquid pesticide, fungicide, insecticide), fertilizer (e.g. solid or liquid) and/or dressing (e.g. on seeds).

Factors influencing residues and their effects on the residues can be determined, for example, by means of empirically determined data, for example by so-called field data. Laboratory tests and laboratory data can also be taken into account here.

A setting in relation can take place in particular by means of an algorithm.

It should also be pointed out that the terms "control" and "regulate" or "control device" and "regulation device" can refer to electronic and/or pneumatic and/or hydraulic controls or regulations that, depending on the training, control tasks and/or can take on regulatory tasks. Even if the term “control” is used here, it can also appropriately include “rules”. Likewise, when using the term “rules” a “control” can also be included.

To avoid repetition, features disclosed in connection with the system should also apply and be claimable according to the method and disclosed for an agricultural spreading machine. The aforementioned aspects and features and embodiment variants according to the invention, in particular with regard to the system, therefore also apply to the method and to the distribution machine and can be freely combined with one another in any way. The same applies in reverse, so that all aspects, features according to the invention and design variants in connection with the method or the distribution machine are disclosed, are therefore also disclosed for the system and can be claimed accordingly.

To achieve the objects, the invention also includes a method for determining and/or forecasting residues, in particular chemical and/or biological residues, on agricultural crops.

The method includes providing a computer unit with an evaluation program and an output device. The method also includes setting at least two residue-influencing factors in relation by means of the evaluation program.

According to one development, the method can provide that the evaluation program is set up to use the relation to determine and/or predict a quantity of residues, in particular chemical and/or biological residues, on agricultural crops and that the evaluation program is set up to calculate residues for to determine and/or predict a substance and/or for several different substances and/or for a sum of residues comprising several substances.

The system and the method are designed to plan harvest quantities, in particular to plan them in advance and, on the basis of residue requirements, to plan crop protection measures at an early stage in such a way that the residue requirements can be met.

According to an alternative or additional embodiment variant of the method, in order to plan harvest quantities, it can be provided that the evaluation program is set up to process threshold values for residues, in particular for chemical and/or biological residues, and to carry out a yield and/or harvest forecast based on threshold values. In particular, it can be provided that the evaluation program is used to make a forecast with regard to a harvested quantity, preferably such that the harvested quantity does not exceed a threshold value.

The method can provide for the evaluation program to be set up to process threshold values for residues, in particular for chemical and/or biological residues, and to initiate a definition and/or influencing of a harvest quantity of agricultural crops using threshold values. It can thus be provided that in order to achieve at least a desired harvest quantity which does not exceed a threshold value for residues, a plant protection measure is adapted in accordance with the quantity of residues determined and/or predicted by means of a relation.

According to the method, it can be provided that a threshold value for residues is defined as a function of various criteria. An evaluation is carried out as criteria, for example, as to whether the crop is used as food for a person (e.g. also taking age into account) and/or as food for an animal and/or whether the crop is used as food or seed and/or or whether the crop is processed directly or not. For example, the threshold values can be defined differently when the crop is used as food than when the crop is used as seed, for example.

According to the method, it can be provided that at least one factor influencing residue is measurable (e.g. sensory). It would also be conceivable that at least one factor influencing the residue can be determined empirically and/or that at least one factor influencing the residue can be determined by means of mathematical calculations, which are carried out, for example, by the evaluation program. Alternatively or additionally, it would be conceivable that at least one factor influencing the residue can be entered into the evaluation program (e.g. manually by an operator) and/or can be read into the evaluation program by means of data transmission (e.g. from a database, data cloud, sensor device, etc.).

According to the method, it can be provided that at least one factor influencing residue is defined by at least one time, in particular active time and/or instability and/or environmental resistance and/or by work processes during processing (of the harvested crop).

To solve the tasks, the invention also includes an agricultural distribution machine, preferably a field sprayer, fertilizer spreader, seed drill and/or the like. According to the invention, it is provided that the distribution machine includes a system as described herein, preferably a system according to one of claims 1 to 13 and/or or is signal-connected and/or signal-connectable to such a device. Alternatively or additionally, it can also be provided that the distribution machine is set up to carry out a method according to one of Claims 14 to 19.

The distribution machine is used in particular for applying and distributing crop protection agents. And has a large working width of 6 meters, 12 meters, 18 meters or more.

The distribution machine, preferably the field sprayer, the fertilizer spreader, the sowing machine or the like can be designed as a self-propelled distribution machine or as a one towed by a towing vehicle (e.g. tractor) or attached to a towing vehicle (e.g. by means of a three-point hitch).

• 1 eine schematische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Computergestützten System,
• 2A bis 2D verschiedene schematische Darstellungen von in Relation gesetzten, Rückstände beeinflussenden Faktoren.

The preferred embodiments, features and aspects of the invention described above can be freely and freely combined with one another. Further details and advantages of the invention are described below with reference to the accompanying drawings. The proportions of the individual elements to one another in the figures do not always correspond to the real proportions, since some forms are shown in simplified form and other forms are shown enlarged in relation to other elements for better illustration. Show it:

• 1 a schematic representation of an embodiment of a computer-aided system according to the invention,
• 2A until 2D various schematic representations of related factors influencing residues.

The in the 1 and 2 The embodiments shown correspond at least in part, so that similar or identical parts are provided with the same reference numbers and, for their explanation, reference is also made to the description of the other embodiments or figures in order to avoid repetition. The illustrated embodiments only represent examples of how the system according to the invention, the method according to the invention and the distribution machine according to the invention can be designed and implemented and do not represent any final limitation.

According to the schematic representation of a computer-aided system according to the invention 1 this includes a computer unit 100 in which an evaluation program can be stored and/or with which an evaluation program can be called up and an output device 110 in the form of a graphic display. The computer unit 100 is according to the 1 as a mobile device, in particular as a so-called smartphone or tablet.

The system is set up (e.g. configured) in relation to two backlog-influencing factors (cf. 2A until 2D ) to set.

The system includes and/or is signal-connected to an agricultural distribution machine 120, wherein the agricultural distribution machine 120 in turn can also include the system and/or be set up to carry out a method as described herein or according to one of claims 14 to 19. The distribution machine 120 is designed as a self-propelled field sprayer or autonomous self-propelled field sprayer. However, it would also be conceivable for the distribution machine to be designed as a fertilizer spreader, seed drill or the like. In addition, it would be conceivable for the distribution machine to be designed as a distribution machine that is towed by a towing vehicle (e.g. tractor) or attached to a towing vehicle (e.g. by means of a three-point hitch). The distribution machine 120 is used in particular to carry out a plant protection measure, i.e. the distribution machine is set up in particular to distribute plant protection products (e.g. sprays, fertilizers, dressings and/or the like).

The system is used to determine and/or predict residues R on agricultural crops, with at least two (according to the 2A three and according to the 2 B until 2D four) residue affecting factors F1; F2; F Xn can be put in relation to one another in this way, ie can be put in relation to one another in this way, for example, in order to determine and/or predict a quantity of residues. In particular, chemical and/or biological residues can thus be determined and/or predicted.

The evaluation program and the output device 110 are set up to determine and/or predict residues for one substance and/or for a number of different substances and/or for a sum (e.g. amount of residue) of residues comprising a number of different substances and to output these using the output device 110 ie, for example, display. Wherein the display may have a weight and / or may have a percentage, according to the 1 however, has a weight indication.

It is conceivable that threshold values for residues, in particular for chemical and/or biological residues, can be defined. The threshold values can, for example, be entered manually and/or read in, for example the threshold values can be retrieved or specified from a data cloud 140 and/or from a harvested crop storage system 130 and/or a distribution machine 120.

The computer unit 100 is in particular signal-connected and/or signal-connectable to the distribution machine 120, to the crop storage system 130 and to the data cloud 140, for example by means of data transmission devices 150, the data transmission devices 150 being wireless, for example and/or be able to establish a wired signal connection.

With the aid of the system according to the invention and the method according to the invention, it is possible to plan harvest quantities. For this purpose, for example, a crop storage system 130 can in turn define maximum values (e.g. threshold values) for residues and use these to carry out a harvest forecast, i.e. it can be determined and/or predicted using the relation how much quantity of crop exceeds a threshold value or not Accordingly, based on these threshold values, crop protection measures carried out by means of spreading machines 120 can be planned and/or adjusted accordingly.

According to the embodiment of 1 it is provided that at least one factor influencing the residue is measurable. A corresponding sensor 160 is attached to the distribution machine 120 for this purpose. The sensor 160 is set up here to detect a distribution quality (eg drift sensor, thermal imaging camera, etc.) of crop protection agents during the crop protection measure. Other sensors would also be conceivable and sensors would also be conceivable which are not arranged on a distribution machine. Manual input by an operator, for example, would also be conceivable. It would also be conceivable to read in by means of data transmission, e.g. from a database, data cloud or the like.

It should be pointed out that the computer unit 100 is also a component and/or is signal-connected or can be signal-connected to a control and/or regulating device of the agricultural distribution machine 120 and/or the harvested crop storage system 130 .

As from the embodiment of 1 In particular, the computer unit 100 is set up to determine backlog influencing factors F1; F2; FXn to receive (e.g. sensory, by an operator input, by reading from a data cloud) according to the 1 marked with an E. In addition, the computer unit 100 is set up, factors F1 influencing backlog; F2; FXn to process (e.g. to put in relation) according to the 1 marked with a V. In addition, the computer unit 100 or the output device 110 is set up to output a result that defines a residue (eg graphically, acoustically, haptically) according to FIG 1 marked with an A.

One possibility of putting at least two factors in relation comes from the 2A until 2D out. In this case, only one possibility of setting in relation is shown and in turn other embodiments for the relation would be conceivable and conceivable.

Three or four residue influencing factors F1 (e.g. time); F2 (e.g. instability); F3 (e.g. environmental resistance); FXn (further factors) are entered in three or four axes in a coordinate system. Depending on the extent of the impact on the influence of the residues, corresponding points P (e.g. coordinates are entered in the coordinate system. By connecting the points P, an area is then formed, i.e. a residue area RF (e.g. sum of residues), which in turn corresponds to a quantity of residues.

Insofar as all residues influencing factors F1; F2; F3; FXn, have the same or almost the same effects on the residues, the axes of the coordinate system are each arranged at identical angles to one another, according to the exemplary embodiments 2A until 2C at 60° to each other or 90° to each other, these angles again depending on the number of residue influencing factors F1; F2; F3; FXn, may vary.

Insofar as not all residues influencing factors F1; F2; F3; FXn, have the same or nearly the same effect on the residues, the axes of the coordinate system are set according to the 2D placed at different angles to each other. Thus, a relation is possible which shows, for example, that a residue-influencing factor Xn has greater effects compared to a residue-influencing factor F1 than compared to a residue-influencing factor F3.

Although the invention has been described with reference to specific embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents substituted without departing from the scope of the invention. In addition, many modifications can be made without leaving the associated area. Accordingly, the invention should not be limited to the disclosed embodiments, but should include all embodiments falling within the scope of the appended claims. In particular, the invention also claims protection for the subject matter and the features of the subclaims independently of the claims referred to.

Reference List

100

computer unit

110

output device

120

distribution machine

130

crop storage system

140

data cloud

150

data transmission facilities

160

sensor

E

input

V

processing

A

output

P

Point

FR

tailings area

F1

Factor influencing residues

F2

Factor influencing residues

F3

Factor influencing residues

FXn

Factor influencing residues

Claims (20)

Computer-aided system for determining and/or forecasting residues, in particular chemical and/or biological residues, on agricultural crops, - with a computer unit (100) with an evaluation program and an output device (110), characterized in that - the evaluation program is set up to put at least two residue-influencing factors in relation. system after claim 1 , characterized in that the evaluation program is set up to use the relation to determine and/or predict a quantity of residues, in particular chemical and/or biological residues, on agricultural crops. System according to one of the preceding claims, characterized in that the evaluation program is set up to determine and/or predict residues for one substance and/or for several different substances and/or for a sum of residues comprising several different substances. System according to one of the preceding claims, characterized in that the evaluation program is set up to process threshold values for residues, in particular for chemical and/or biological residues, the threshold values being manually input and/or readable. System according to one of the preceding claims, characterized in that the evaluation program is set up to process threshold values for residues, in particular for chemical and/or biological residues, and based on threshold values - to carry out a yield and/or harvest forecast and/or - to make a definition and/or influencing a harvest quantity of agricultural crops. System according to one of the preceding claims, characterized in that a threshold value for residues is defined as a function of at least one, - human food and/or - animal food and/or - food or seed and/or - direct further processing or not. System according to one of the preceding claims, characterized in that the residues are caused by plant protection measures and/or by air pollution. System according to one of the preceding claims, characterized in that at least one factor influencing the residue - can be measured and/or - can be determined empirically and/or - can be determined by means of mathematical calculations and/or - can be entered into the evaluation program and/or - by means of data transmission can be read into the evaluation program. System according to one of the preceding claims, characterized in that at least one factor influencing a residue is defined by at least one of the following: - a time, in particular effective time, and/or - an instability, and/or - an environmental resistance, and/or - by work processes the processing. System according to one of the preceding claims, characterized in that the computer unit (100) is part of a control and/or regulation device and/or is signal-connected and/or signal-connectable to a control and/or regulation device of an agricultural distribution machine (120) and is set up , Based on residues, adjust a quantity of crop protection products to be distributed. System according to any one of the preceding claims, characterized in that a Adjustment of a quantity of plant protection products to be distributed is carried out in such a way that a threshold value of residues, in particular for chemical and/or biological residues, on agricultural crops is not exceeded. System according to one of the preceding claims, characterized in that the computer unit (100) is set up to receive, generate and/or retrieve facts influencing backlogs, to relate factors influencing backlogs and to output a result defining a backlog, preferably by means of an output device (110) to issue. System according to one of the preceding claims, characterized in that the computer unit (100) is formed by an operator terminal, a mobile terminal device and/or a computer and has an output device (110) and/or is signal-connected to an output device (110) and/or can be signal-connected, the output device (110) carrying out a graphic, optical and/or haptic output. Method for determining and/or forecasting residues, in particular chemical and/or biological residues, on agricultural crops, characterized by the steps: - providing a computer unit (100) with an evaluation program and an output device (110), - relating them of at least two factors influencing residues by means of the evaluation program. procedure after Claim 14 , characterized in that the evaluation program is set up to use the relation to determine and/or predict a quantity of residues, in particular chemical and/or biological residues, on agricultural crops and that the evaluation program is set up to determine residues for a substance and/or or to determine and/or forecast residues for several different substances and/or a sum of residues comprising several substances. Procedure according to one of Claims 14 or 15 , characterized in that the evaluation program is set up to process threshold values for residues, in particular for chemical and/or biological residues, and based on threshold values - to carry out a yield and/or harvest forecast and/or - to define and/or influence a Harvest amount of agricultural crops, especially a grain to initiate. Procedure according to one of Claims 14 until 16 , characterized in that a threshold value for residues is defined depending on at least one of the following, - human food and/or - animal food and/or - food or seed and/or - direct further processing or not. Procedure according to one of Claims 14 until 17 , characterized in that at least one factor influencing the residue - can be measured and/or - can be determined empirically and/or - can be determined by means of mathematical calculations and/or - can be entered into the evaluation program and/or - can be read into the evaluation program by means of data transmission. Procedure according to one of Claims 14 until 18 , characterized in that at least one factor influencing residue is defined by at least one of the following: - a time, in particular effective time and/or - an instability, and/or - an environmental resistance, and/or - by processing work processes. Agricultural distribution machine (120), preferably field sprayer, fertilizer spreader, seed drill or the like. Which - a system according to one of Claims 1 until 13 comprises or is signal-connected and/or signal-connectable to such a device and/or - is set up, a method according to one of Claims 14 until 19 to execute.

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